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Comparative characteristics of biosynthesis of polyhydroxybutyrate from methanol by Methylobacteria extorquens G10 and Methyloligella halotolerans C2

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Abstract

The biosynthesis of polyhydroxybutyrate by Methylobacteria extorquens G10 and Methyloligella halotolerans C2 via the serine pathway of C1 metabolism was comparatively studied. Nitrogen limitation stimulated synthesis of the biopolymer in both cultures. It was shown that, despite the similarity of the pathways of methanol metabolism and those of polyhydroxybutyrate biosynthesis, the methylobacteria synthesized polymers of different molecular weights. In the case of M. extorquens G10, an increase in the content of the residual nitrogen in the culture medium was found to result in a reduction of the molecular weight of the polymer from 250 to 85 kDa, whereas M. halotolerans C2 synthesized a polymer of high molecular weight (approximately 3000 kDa) regardless of the residual content of the nitrogen source. It was established that the examined methylobacteria can utilize not only pure methanol but also a crude one, a feature that made it possible to significantly reduce the cost of the resulting polyhydroxybutyrate.

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Correspondence to Yu. A. Trotsenko.

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Original Russian Text © M.N. Poroshina, N.V. Doronina, V.A. Ezhov, Yu.A. Trotsenko, 2014, published in Prikladnaya Biokhimiya i Mikrobiologiya, 2014, Vol. 50, No. 3, pp. 283–288.

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Poroshina, M.N., Doronina, N.V., Ezhov, V.A. et al. Comparative characteristics of biosynthesis of polyhydroxybutyrate from methanol by Methylobacteria extorquens G10 and Methyloligella halotolerans C2. Appl Biochem Microbiol 50, 253–258 (2014). https://doi.org/10.1134/S0003683814030132

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  • DOI: https://doi.org/10.1134/S0003683814030132

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